PLCC-44 (Plastic Led Chip Carrier with 44 leads) is an integrated circuit packaging form of Surface Mount Technology (SMT). The PLCC package is known for its rectangular shape and J-shaped pins, which bend outward from the four sides of the package, forming a structure that is easy for automatic plug-in machines to insert.

characteristic:

J-shaped pins: The pins of the PLCC package are J-shaped, which allows the package to be used in sockets or directly soldered to PCBs.

Reusability: As it can be installed through sockets, PLCC encapsulated ICs can be easily removed and replaced, which is very useful during the development and debugging stages.

Durability: The plastic material and pin design of PLCC packaging provide good mechanical strength and durability.

Medium size: Compared to smaller SMT packages such as QFP or SOP, PLCC packages are usually slightly larger, but still smaller than early dual in line (DIP) packages.

Medium Pin Count: PLCC-44 refers to a package with 44 pins, suitable for integrated circuits of medium complexity.

Structure:

The structure of the PLCC-44 package includes a rectangular plastic shell surrounded by J-shaped pins that bend outward. The pitch is usually 0.05 inches (approximately 1.27 millimeters), which is the standard pitch for PLCC packaging.

Size:

The size of the PLCC-44 package may vary depending on the specific manufacturer and product model, but usually follows JEDEC standards. Generally speaking, the size of the PLCC-44 package is roughly within the following range:

Package length: usually between 17mm and 20mm.

Package width: usually similar in length, also between 17mm and 20mm.

Packaging thickness: usually between 4mm and 5mm.

The length and width of the pins may also vary according to standards, but they are usually designed to be sturdy enough to withstand multiple insertion and extraction processes.

Application:

PLCC-44 packaging is commonly used in microcontrollers, memory chips (such as EPROM, EEPROM, Flash memory), logic devices, and other moderately complex integrated circuits. Due to its pluggable nature, PLCC packaging has been very popular in the development and maintenance of electronic products in the past.

matters needing attention:

When using PLCC-44 packaging, the following points should be noted:

Welding process: If directly welded, it is necessary to ensure that the pins are correctly aligned and the welding quality is good to avoid short circuits or open circuits.

Socket compatibility: If using a socket, it is necessary to choose a socket that is compatible with the PLCC-44 package and ensure reliable contact of the socket.

Thermal management: Although PLCC packaging is not specifically designed for thermal management, heat dissipation issues still need to be considered in high-power applications.

When selecting a PLCC-44 package, reference should be made to the manufacturer's data manual and application notes for detailed dimensional information, recommended design guidelines, and welding process parameters. With the development of SMT technology, PLCC packaging has gradually been replaced by more advanced packaging forms, but it is still a practical choice in certain specific application scenarios.